Churn



Patented Aug. 21', I844.

FIG, :2.

NY PETERS. Phutn-Lilhagraphnr. Washingmm ac,

unirnn STATES PATENT OFFICE.

THOMAS LING, OF PORTLAND, MAINE.

CHURN.

Specification of Letters Patent No. 3,714, dated August 21, 1844.

To all whom it may concern Be it known that I, THOMAS LING, of Portland,in the county of Cumberland, in the State of Maine, have invented a newand useful Churn; and I do hereby declare that the following is a full,clear, and exact description of the construction and operation of thesame, reference being had to the anneXed drawings, making part of thisspecification, in which Figure l is an isometrical projection of thecomplete churn, Fig. 2 a central, vertical section, showing the interiorarrangement, and Fig. 3 is a projection of the small lid, removed atFig. l.

0onstrwction.ln the center of a vertical cylinder A, permanently closedat the bot tom, is placed another vertical cylinder B, of about half thediameter of the former, and somewhat lower than it. This smallercylinder is furnished near its bottom with a sufficient number ofcircular perforations Z) for the purpose hereinafter described, and onits top it has a flange b, which stands at an inclination of 60 degreeswith the horizon. In the center of the smaller cylinder 13 stands thevertical shaft C, around which winds the archimed-ean screw D. Thisscrew starts very near the bottom of the cylinder and below theaforesaid perforations b, and reaches up to the top of the saidcylinder. The diameter of the screw is such as to admit the screw torevolve with ease, but its periphery approaching as near as possible theinner surface of the cylinder B. The large cylinder is closed on the topby a lid A, which covers the whole surface, and which has a smaller,segmental opening in it, covered by a corresponding lid a. The lids arefurnished with knobs a, by which they are to be put on or removed. Theshaft 0 passes through the center of the larger lid,

and is furnished with a crank c and handle 0 at its upper extremity,which former is confined to the shaft by means of a nut or screw 0 onits top.

0pemzfz'on.The cream having been admitted into the churn'in sufiicientquantity, the crank c is turned, which causes the shaft C to revolve,and the cream entering from the larger cylinder A, through the per-forations Z2 at the bottom, into the smaller cylinder B, the screw D willconsequently raise the cream to the top of the smaller cylinder, andthen discharge it again into the larger one, the butter accumulating onthe top of the space between the two cylinders. In consequence of thewithdrawing of the cream through the perforations from the largercylinder, its raising spirally in the smaller cylinder, and its finaldischarge into the former again, a constant motion is kept up throughoutthe whole body of cream, which creates a tendency of accelerating theprocess of churning. Very little power is required to carry on theprocess, whereas the resistance to it is but little and confined to asmall space.

What I claim as my invention and desire to secure by Letters Patent, is

The combination of the large cylinder A, the small cylinder B with itsperforations b and flange b, and an apparatus. for withdrawing the creamfrom the large cylinder, raising it in the small cylinder, anddischarging it again into the larger one, not however confining myselfto the screw D for that purpose, but substituting any other con-'trivance, by which the same result. can be ob tained.

THOMAS LING. Witnesses:

JOHN Hun'rz, FRANCIS BENNE.

